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Building Technologies Basic Documentation LMV37.4... CC1P7546en
HVAC Products 29 Revision history of basic unit LMV37.4... 01.12.2009
Software version V03.10
• Optimization: If power supply fails during the restore process, the data set can be
repaired by starting a new restore process (since the backup / restore option is not
yet available with V03.00 because there is no suitable AZL2..., this effect cannot
occur)
• Optimization: When making a reset via the AZL2..., an incomplete reset occurred in
very rare cases (display showed
RESEt, but reset was not triggered)
• Optimization: The time ascertained by the loss-of-flame test was 0.2 seconds too
long
• Optimization: Reduced detection of undervoltage when fan motor is started in phase
22 (when a single-phase motor and the LMV37.8… 120 V were powered via the
same phase, undervoltage detection could occur on startup; in that case, the
LMV37.8… system was not operated as specified)
• Optimization: Better overview through text changes of groups 200=PAr0, 300=PAr1
and 600=ACtr on the parameter menu (initially PArA), and hiding of unused pa-
rameters after selection of fuel train / operating mode
• Optimization: Control of the fan output during standardization (standby) for using a
release contact via an external relay at the fan’s output
• Optimization: Curve setting invalid (OFF UPr) after new / further standardization
• Optimization: To shorten the startup time, there is no referencing when postpurging
is aborted via controller-ON (direct start)
• Automatic return travel of the SQN1... at the lower internal stop
• Parameter on Siemens level
Longer ignition off time during safety time 1 (TSA1) (increased from 0.4 to 0.6 sec-
onds) to prevent wrong error diagnostics in connection with QRA2… (C:7 in place of
C:2)
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